胜利褐煤在液化预反应中氧脱除的初步研究

PRELIMINARY STUDY ON OXYGEN ELIMINATION IN SHENGLI LIGNITE DURING LIQUEFACTION PREREACTION

采用X光电子能谱法(XPS)研究了我国内蒙胜利褐煤中有机氧的赋存形态,将其分为碳氧单键类、羰基基团和羧基基团三种类型,与元素分析法结合得到不同形态含氧官能团在胜利褐煤中的绝对含量,与化学分析法测试煤中含氧官能团进行比较.在容积为0.5L震荡式高压釜中对内蒙胜利褐煤在液化预反应阶段氧的脱除进行了研究,实验所选温度为330℃,360℃,400℃和430℃,分别考察三种催化剂(MnO2,Fe2O3和MoO3)的脱氧效果,并与无催化剂的脱氧效果进行比较,结果表明,氢压1MPa无催化剂在360℃～400℃的液化预反应条件下,脱氧率较高.

The forms of organic oxygen in Shengli lignite are studied by XPS. Three kinds of oxygen functional groups are classified in the method, single-bond, carbonyl group and carboxyl group. The absolute content of different oxygen functional groups is obtained by XPS combined with ultimate analysis and compared with chemistry analysis. The elimination limit of CO and CO2 has been calculated during coal liquefaction prereaction. The elimination of oxygen functional group in Shengli lignite during preliquefaction is studied in 0.5 L shaking-style autoclave at the temperature range of 330℃, 360℃, 400℃ and 430℃. Deoxidization effect at the presence of three kinds of catalysts including MnO2, Fe2O3 and MoO3 is observed and compared with that of non-catalyst. The results show that higher oxygen elimination is obtained at H2 pressure 1 MPa, temperature range 360℃-400℃,non-catalysts.